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New perch for the winged helix

The human transcription factor, RFX1, is found to belong to the winged-helix family of DNA binding proteins, despite an absence of significant sequence similarity. Even more surprising is the very different mode of DNA binding as compared with previously characterized winged-helix proteins that bind to B-form DNA.

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Figure 1: Structure of two hRFX1 proteins bound to a palindromic DNA site.
Figure 2: Comparison of DNA binding by the winged-helix proteins a, hRFX1 (red) and b,HNF-3 (cyan).

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Correspondence to Cynthia Wolberger.

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Wolberger, C., Campbell, R. New perch for the winged helix. Nat Struct Mol Biol 7, 261–262 (2000). https://doi.org/10.1038/74004

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